CN111787785A

CN111787785A - Weeding brush, weeding accessory with weeding brush and weeding machine

Info

Publication number: CN111787785A
Application number: CN201980015152.XA
Authority: CN
Inventors: 杉本胜茂
Original assignee: Shanyang Thermal Industry Co ltd
Current assignee: Shanyang Thermal Industry Co ltd
Priority date: 2018-09-21
Filing date: 2019-08-02
Publication date: 2020-10-16
Anticipated expiration: 2039-08-02
Also published as: WO2020059323A1; JP2020043843A; JP6998053B2; CN111787785B; KR20210053810A

Abstract

The present invention relates to a weeding brush (20) which is mounted on a traveling machine body moving in a paddy field to weed, wherein the weeding brush (20) weeds by rotating, and the weeding brush comprises: the elastic member comprises a plurality of linear elastic bodies (43) and a base (49) for fixing the linear elastic bodies (43), wherein the plurality of linear elastic bodies (43) are arranged to extend in a slender shape in the direction of a rotation center line (53) of rotation, and surround a vertically long space (52), forming a cage-shaped structure with an open front end.

Description

Weeding brush, weeding accessory with weeding brush and weeding machine

Technical Field

The present invention relates to a weeding brush used for a weeding machine that performs weeding while moving in a paddy field.

Background

A weeding machine that performs weeding while moving in a paddy field is known. For example, in a weeding machine described in patent document 1, a weeding machine is connected to a traveling machine body, and the weeding machine includes a freely rotatable weeding wheel and a rake for weeding. The weeding wheels rotate around a horizontal axis relative to the traveling direction of the traveling machine body to weed, and the rake is made of a linear elastic material and the front end of the rake is inserted into the field to weed.

In the weeding machine described in patent document 1, the weeding wheels are positioned in the vicinity of the traveling machine body, so that the amount of lateral oscillation of the weeding wheels when the traveling machine body snakes left and right is suppressed to be small, and the seedlings are pushed down by the weeding wheels when the traveling machine body snakes left and right, thereby preventing such a problem that the planted seedlings are damaged.

In addition, since the harrows are made of elastic material, even if the harrows are contacted with the seedlings, the seedlings are not easy to be broken or pulled out due to the elasticity of the harrows, and the two harrows are arranged in the front and the back, so that the weeding effect of the harrows caused by one-time weeding running can be improved.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2006-271340

Disclosure of Invention

Technical problem to be solved by the invention

However, the weeding machine described in patent document 1 is an invention for solving the following technical problems: in the case where the traveling machine body snakes left and right due to a change in the tiller in a paddy field or the like, the weeding rotor sometimes swings left and right largely so that the weeding rotor pushes down the seedling to cause damage.

The present invention has been made to solve the above-described conventional problems, and an object thereof is to provide a weeding brush capable of improving a weeding effect and preventing damage to a seedling by structural features of a weeding mechanism itself directly related to weeding, and a weeding attachment and a weeding machine provided with the weeding brush.

Solution for solving the above technical problem

In order to achieve the above object, a weeding brush according to the present invention is a weeding brush attached to a traveling machine body moving in a paddy field to weed, and includes a plurality of linear elastic bodies and a base to which the linear elastic bodies are fixed, the plurality of linear elastic bodies being arranged to extend in a slender shape in a direction of a rotation center line of the rotation, and to surround a longitudinal space, thereby forming a cage-shaped structure having an open front end.

According to the weeding brush of the present invention, by forming the cage-shaped structure, a relatively large number of the string-shaped elastic bodies can be easily arranged on the base, and the tip portion is continuously buried in the soil and gathered up with the rotation of the inclined weeding brush during weeding, so that the weeding effect can be improved.

Further, since the linear elastic body is elongated in addition to being linear and elastic, it is easy to bend, and damage to the seedling during weeding can be prevented regardless of the positional relationship between the weeding brush and the seedling in the width direction of the weeding brush, and there is no fear of damage to the seedling even if the weeding machine is driven to swing left and right.

Further, the plurality of linear elastic bodies are arranged to extend in a slender shape in the direction of the rotation center line of the brush and to surround the longitudinal space, so that the intervals between the adjacent linear elastic bodies can be kept wide from the root to the tip, and therefore, grass is less likely to be entangled.

In the weeding brush according to the present invention, the distal ends of the plurality of string-like elastic bodies are preferably inclined toward the longitudinal space. According to this configuration, when the weeding brush is inclined to weed, the leading end portion can be buried in the soil in a lateral direction, and thus the gathering effect can be improved.

It is preferable that 1 linear elastic body is bent to form 2 linear elastic bodies. According to this configuration, the bent end portion can be used as a positioning member, and the 2 linear elastic bodies can be positioned at a time, so that the manufacturing becomes easy.

The weeding attachment of the present invention is a weeding attachment provided with each of the weeding brushes of the present invention, and is configured to be replaceable with respect to the travel machine body.

Effects of the invention

As described above, in summary, according to the weeding brush of the present invention, since a relatively large number of string-shaped elastic bodies can be easily arranged on a base, and the tip portion is continuously buried in soil and the soil is gathered up during weeding, the weeding effect can be improved, the string-shaped elastic bodies are easily bent, damage to seedlings during weeding can be prevented regardless of the positional relationship between the weeding brush and the seedlings, and the interval between adjacent string-shaped elastic bodies can be kept wide from the root to the tip, and thus grass is less likely to be entangled.

Drawings

Fig. 1 is a side view of a weeding machine according to an embodiment of the present invention.

Fig. 2 is a top view of the weeding machine shown in fig. 1.

Fig. 3 is an enlarged perspective view of a weeding brush according to an embodiment of the present invention.

Fig. 4 is a side view of the herbicidal brush shown in fig. 3.

Fig. 5 is a side view showing the weeding brush shown in fig. 4 in an exploded state.

Fig. 6 is a cross-sectional view along line AA of fig. 4.

Fig. 7 is a side view showing a state in which a weeding machine of an embodiment of the present invention is weeding.

Fig. 8 is an enlarged view of a main portion showing a case of weeding by the weeding brush of the embodiment of the present invention.

Fig. 9 is an enlarged view of a main portion of fig. 7 as viewed from the direction of arrow a.

Fig. 10 is a diagram showing a state in which travel of the weeding machine according to the embodiment of the present invention is deviated to the left side from the state of fig. 9.

Fig. 11 is a side view of the weeding machine showing a state in which the weeding attachment according to the embodiment of the present invention is lifted.

Fig. 12 is an enlarged view of a main part of a swing mechanism of a weeding brush according to an embodiment of the present invention.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a side view of a weeding machine 1 according to an embodiment of the present invention. The present figure shows a state in which the weeding machine 1 is running in a paddy field in a water storage state, and reference numeral 21 denotes a water surface. Seedlings 22 are planted in the paddy field.

The weeding machine 1 has a weeding attachment 3 replaceably mounted on a travel machine body 2. The traveling machine body 2 is provided with front wheels 5 and rear wheels 6 mounted on a machine body 4, and an operator sitting on a seat 7 operates an operation panel, a shift lever, an operation pedal, and the like, which are not shown, in addition to a steering gear 8 to drive the vehicle. In the present embodiment, the front wheel 5 side of the weeding machine 1 is referred to as the front side, and the opposite side thereof is referred to as the rear side.

The main parts of the weeding attachment 3 are a weeding brush 20, a weeding brush 30 and a weeding brush support body 10. A coupling shaft 12 is connected to the engine 9 of the traveling machine body 2, and a rotation transmission shaft 13 is connected to the coupling shaft 12. The rotation transmission shaft 13 has a hollow portion, and an expansion shaft 14 having a hexagonal cross section is inserted therein.

The coupling shaft 12 is rotationally driven by the engine 9, and the rotation transmission shaft 13 and the telescopic shaft 14 rotate integrally with the coupling shaft 12. By the rotation of the telescopic shaft 14, a drive system inside the support body 10 is driven by a sprocket or a gear (bevel gear), and the power is transmitted to a rotating shaft inside the support body 10 while appropriately changing the direction by a universal joint, thereby rotating the

weeding brushes

20, 30. Further, the link mechanism 11 is driven to move up and down the weeding attachment 3 by extending and contracting the rod 17 provided in the hydraulic mechanism 16, and the

weeding brushes

20 and 30 are moved up and down integrally with the weeding attachment 3.

The traveling machine body 2 has the same structure as that for a rice transplanter. The rice transplanter is equipped with devices corresponding to the engine 9, the link mechanism 11, and the hydraulic mechanism 16, and the engine 9 can be used as a rotation drive source for the

weeding brushes

20, 30, and the hydraulic mechanism 16 and the link mechanism 11 can be used as a lifting mechanism for the

weeding brushes

20, 30. Therefore, the rice transplanter can be detached from the attachment for transplanting rice provided in the rice transplanter, the weeding attachment 3 can be attached, and the travel machine body of the rice transplanter can be transferred to the travel machine body of the weeding machine.

Fig. 2 is a plan view of the weeding machine 1 shown in fig. 1. A plurality of

weeding brushes

20, 30 are mounted on the weeding attachment 3. The plurality of

weeding brushes

20, 30 are arranged in front and rear 2 rows, and a weeding brush row is formed on the front side by the weeding brush 20 and a weeding brush row is formed on the rear side by the weeding brush 30. In the present embodiment, the front row side weeding brush is denoted by reference numeral 20, and the rear row side weeding brush is denoted by reference numeral 30. When the

weeding brush

20, 30 is linearly moved forward while rotating the weeding brush 1, the

weeding brush

20, 30 linearly moves forward along the row L1 to L5 integrally therewith, and weeds are sequentially removed from the grass between the inter-plant 50 and the inter-row 51 as described in detail below.

Fig. 3 shows an enlarged perspective view of the weeding brush 20 shown in fig. 1 and 2, and fig. 4 shows a side view of the weeding brush 20. Although the explanation is made by taking the example of the weeding brush 20, the weeding brush 30 has the same structure. In fig. 3, the weeding brush 20 has a linear elastic body 43 fixed to a base 49 formed by a pair of disc-shaped upper plate 40 and lower plate 41, and the linear elastic body 43 is fixed to a support 42 disposed between the upper plate 40 and lower plate 41. As shown in fig. 4, the upper plate 40 and the lower plate 41 are fixed by bolts 45 and nuts 46 with the support 42 interposed therebetween.

As shown in fig. 3 and 4, the mounting tube 44 of the rotary shaft is fixed to the upper plate 40, and the rotary shaft (not shown) can be fixed to the mounting tube 44 by inserting the rotary shaft into the mounting tube 44 and fitting the pin into the pin hole 55. The brush 20 rotates about the rotation axis of the mounting tube 44 mounted on the rotation axis. Reference numeral 53 of fig. 4 denotes a rotation center line of the rotation.

Fig. 5 is a side view showing the weeding brush 20 shown in fig. 4 in an exploded state. The linear elastic body 43 is formed by bending 1 piece of spring material made of metal or the like into a "U" shape. The spring material is, for example, piano wire, hard steel wire or stainless steel, and preferably has a diameter of about 2mm to 4 mm. In the present embodiment, one weeding brush 20 is provided with 4 string-like elastic bodies 43. Thus, the weeding brush 20 extends from the base 49 by 8 umbilical members (4 in the illustration of fig. 5).

Fig. 6 is a cross-sectional view along line AA of fig. 4. As shown in this figure, a cutout 47 is formed in the support member 42. In fig. 5, the support 42 is fixed to the lower plate 41, and the upper plate 40 and the lower plate 41 are fixed by the bolt 45 and the nut 46 in a state where the upper end portions of the 4 linear elastic bodies 43 are engaged with the notches 47 (see fig. 6) of the support 42, respectively, whereby the linear elastic bodies 43 are integrally fixed to the base 49 in a state of being sandwiched between the support 42 and the upper plate 40, as shown in fig. 4 and 6.

As shown in fig. 4, the plurality of linear elastic bodies 43 are disposed to extend in an elongated shape in the direction of the rotation center line 53 of the weeding brush 20 and to surround the elongated space 52. As a result, the weeding brush 20 forms a cage-shaped structure with an open tip, as shown in fig. 3. Reference numeral 48 denotes a tip end portion of the linear elastic body 43, and as described below, the tip end portion 48 is buried in the soil during weeding, and the root portion of the grass 23 is gathered together with the soil near the tip end portion 48 as the weeding brush 20 rotates (see fig. 8).

By forming the weeding brush 20 in a cage-like structure as described above, a relatively large number of the string-like elastic bodies 43 can be easily arranged on the base 49, and the tip end portion 48 is embedded in the soil without interruption with the rotation of the weeding brush 20 inclined as shown in fig. 8 to gather up the soil, so that the weeding effect can be improved.

Further, as described below, the linear elastic body 43 is elongated in addition to being linear and elastic, and therefore is easily bent, and damage to the seedling 22 during weeding can be prevented regardless of the positional relationship between the weeding brush 20 and the seedling 22 in the width direction of the weeding brush 20, and there is no fear of damage to the seedling 22 even if the weeding machine 1 is driven to swing left and right.

Further, the plurality of linear elastic bodies 43 are arranged to extend in a slender shape in the direction of the rotation center line 53 of the brush 20 and to surround the longitudinal space 52, so that, as shown in fig. 3 and 4, the intervals between adjacent linear elastic bodies 43 can be kept wide from the root to the tip, and therefore grass is less likely to be entangled.

As described above, when weeding, the front end portion 48 is buried in the soil to weed (see fig. 8). As shown in fig. 4, the distance 54 between the tip ends of the adjacent linear elastic bodies 43 is made larger than that between the root ends. Thus, when 2 tip portions 48 are buried in the soil at a time, the interval between the 2 tip portions 48 can be enlarged, and the weeding range can be enlarged.

According to the disassembled structure of the weeding brush 20 shown in fig. 5, the upper plate 40 and the lower plate 41 are fixed by the bolt 45 and the nut 46 in a state where the linear elastic body 43 is engaged with the notch 47 (see fig. 6) of the support 42, and the assembly is completed, so that the disassembly is easy, and the replacement of the linear elastic body 43 is also easy.

Further, since the linear elastic body 43 is bent in a "U" shape, positioning can be easily performed by simply engaging the end portion with the notch 47 (see fig. 6) of the support 42, and positioning of 2 linear elastic bodies 43 can be performed at a time, and thus manufacturing is also easy.

The structure of the weeding brush 20 may also be appropriately modified. For example, the upper plate 40 and the lower plate 41 are not limited to a disk shape, but may be rectangular, and the base 49 may be formed of a single member. The linear elastic bodies 43 may be fixed to the base 49 1 by omitting the bending process of the "U" shape, or may be fixed by welding or the like, and the number of the linear elastic bodies 43 may be changed as appropriate.

Next, the weeding by the weeding machine 1 will be described with reference to fig. 7 to 9. Fig. 7 is a side view showing a state during weeding, corresponding to an enlarged view of the vicinity of the weeding attachment 3 of fig. 1. In this figure, the weeding machine 1 advances in the row direction of the seedling 22 (arrow B direction), and the weeding brushes 20, 30 in rotation (arrow C direction) also advance integrally therewith. This operation results in weeding grass 23 between the plants 50 and grass 23 between the rows 51 (see fig. 9). Weeding is described more specifically with reference to fig. 8 to 10.

Fig. 8 is an enlarged view of a main portion showing a case where the weeding brush 30 removes the grass. For convenience, an example in which the weeding brush 30 rotates in the direction of the arrow D about the mounting tube 44 will be described, but the weeding effect is the same in the case of the reverse rotation. Although the explanation is made by taking the example of the weeding brush 30, the same applies to the weeding brush 20. In fig. 8, the distal end portion 48 of the elastic body 43 in a string shape is buried in the ground. By the rotation of the brush 30 (arrow D direction), the tip portion 48 rotates in a direction protruding from the ground (arrow E direction).

Thereby, the root portion of the grass 23 is gathered together with the soil near the tip end portion 48, and the grass 23 is weeded. By the rotation of the weeding brush 30, the front end portions 48 of the adjacent linear elastic bodies 43 are buried in the ground in sequence and then protrude from the ground. By this repeated operation, the grass 23 within the passing range of the weeding brush 30 is weeded. In particular, in the present embodiment, the tip portion 48 is inclined toward the vertically long space 52 (see fig. 4), and the tip portion 48 can be buried in the soil in a lateral direction, so that the collecting effect can be improved. On the other hand, even in the case where the inclined tip end portion 48 is not provided, the effect of the pinching may be obtained by adjusting the inclination of the brush 30, and the inclined tip end portion 48 may have any configuration.

Fig. 9 is an enlarged view of a main portion of fig. 7 as viewed from the direction of arrow a. For convenience of illustration, the rear side of the weeding brush 20 is simplified in illustration in fig. 9, and illustration of the weeding brushes 20 and 30 on the outer side of the row space 51 is omitted. The seedling 22 in this figure corresponds to the seedlings in the seedling rows L2 and L3 shown in fig. 2. When the seedling row L2 is observed, the linear elastic bodies 43 of the plurality of weeding brushes 30 overlap the seedlings 22. From the state of fig. 9, the weeding brush 30 moves forward (back side of the paper) while rotating, and weeds the grass 23 in the inter-plant 50 (see fig. 7) in the row L2. More specifically, in the row L2, the leading end of the elastic body 43 of the weeding brush 30 rotates in the direction of gathering up the grass 23 together with the soil (arrow G1), and the grass 23 is weeded. The same applies to the adjacent brush 20 (not shown) (arrow G2), and the same applies to the row L3 (arrows G3 and G4).

In fig. 9, in a row space 51 between seedling row L2 and seedling row L3, a weeding brush 20 is disposed at the center portion, and weeding brushes 30 are disposed on the left and right sides. As shown in fig. 2, there are also rows in which the weeding brushes 30 are disposed in the center portion and the weeding brushes 20 are disposed on the left and right sides. Further, since the center portion of the weeding brush 20 and the left and right weeding brushes 30 are arranged at positions shifted in the front-rear direction as shown in fig. 2, the linear elastic bodies 43 do not interfere with each other. That is, since the linear elastic bodies 43 are disposed over the row gaps 51 and the linear elastic bodies 43 rotate, the grass 23 in the row gaps 51 is cut while maintaining an appropriate angle in the depth direction of the soil between the weeding brushes 20 and 30 by buoyancy generated by soil resistance as the weeding brushes 20 and 30 rotate and advance.

On the other hand, the mower 1 is not limited to be able to accurately travel straight along the row lines L1 to L5 (see fig. 2), and the travel of the mower 1 may sway to the left and right. In this case, the positional relationship between the row L2 and row L3 shown in fig. 9 and the weeding brushes 20 and 30 also changes. Fig. 10 shows a state in which travel of the weeding machine 1 is shifted to the left (arrow F) from the state of fig. 9.

Even in the state of fig. 10, since the seedling 22 in the seedling row L2 overlaps the weeding brush 30 and the seedling 22 in the seedling row L3 overlaps the weeding brush 20, grass 23 in the inter-plant 50 (see fig. 7) is weeded in the seedling row L2 and the seedling row L3. In fig. 10, as in fig. 9, the linear elastic bodies 43 are disposed over the row spaces 51, and the grass 23 in the row spaces 51 is removed with the rotation and advancement of the weeding brushes 20 and 30.

Here, in fig. 10, in the seedling row L2, the seedling 22 overlaps the center portion of the brush 30. In this positional relationship, the linear elastic body 43 continuously crosses the seedling 22 due to the rotation of the weeding brush 30, and there is a fear that the seedling 22 is damaged. However, the string-like elastic body 43 of the weeding brush 30 is not only a string-like and elastic body but also a slender one, and therefore is easily bent. Therefore, when the elastic body 43 in a string shape, which is easily deflected, is made to cross the seedling 22, which is easily deflected by the elasticity, the seedling is temporarily deflected, but the seedling 22 is restored to the original state without being particularly damaged after the herbicidal brush 30 passes.

Therefore, even if the seedling 22 overlaps the center portion of the brush 30, the inter-plant 50 (see fig. 7) can be weeded without damaging the seedling 22. That is, by using the weeding brushes 20 and 30 of the present embodiment, even if the positional relationship between the seedling 22 and the weeding brushes 20 and 30 is deviated from the initial reference, weeding can be performed without worrying about damage to the seedling 22. Therefore, if the front wheels 5 and the rear wheels 6 (see fig. 1) of the weeding machine 1 travel in the inter-row space 51 (see fig. 2), weeding can be performed without any obstacle even if the travel of the weeding machine 1 swings left and right.

Further, since the weeding brushes 20 and 30 are configured such that the space surrounded by the plurality of elastic bodies 43 is the vertically long space 52 (see fig. 3 and 4) and the plurality of elongated string-like elastic bodies 43 extend from the base 49 in the direction of the rotation center axis of the weeding brush 20, the intervals between the adjacent string-like elastic bodies 43 can be kept wide from the root to the tip, and therefore, grass is less likely to be entangled.

As described above, in fig. 1, the link mechanism 11 is driven to move the weeding attachment 3 up and down by extending and contracting the rod 17 provided in the hydraulic mechanism 16, and the weeding brushes 20 and 30 are moved up and down integrally therewith. Fig. 11 is a side view of the weeding machine 1 showing a state in which the weeding attachment 3 is raised (in the direction of arrow H). In this state, the weeding machine 1 can be moved without weeding, and replacement of the weeding brushes 20 and 30 and various maintenance operations become easy.

Fig. 12 shows an enlarged view of a main part of the rocking mechanism of the weeding brush 20. Although the vicinity of the brush 20 is shown in the figure, the same applies to the vicinity of the brush 30. The rotary shaft 32 is fixed to the mounting tube 44, and the rotary shaft 32 is positioned in the non-rotating connecting tube 31. Similarly, the rotary shaft 34 is located in the coupling cylinder 33 which does not rotate. The rotation shaft 34 and the rotation shaft 32 are coupled by a universal joint 35, and the rotation of the rotation shaft 34 is transmitted to the inclined rotation shaft 32, so that the brush 20 rotates.

The coupling cylinder 31 is supported by a support body 36, and the support body 36 is supported by a support body 37 by bolts (not shown) fastened to bolt holes 38. The bolt hole on the support 36 side is larger than the diameter of the bolt, and a bolt 39 is attached to the support 37. The axis of the bolt is located on the same line as the starting point of the universal joint 35. With this configuration, the support body 36 and the weeding brush 20 integrated therewith can swing about the bolt hole 38, and the swing range is restricted by the bolt 39. Therefore, when the weeding machine 1 advances, the weeding brush 20 swings in accordance with the buoyancy caused by the resistance of the soil (arrow J). That is, the weeding effect is improved because the weeding brush 20 swings according to the state of the soil.

The embodiments of the present invention have been described above, but these are merely examples and may be appropriately modified. For example, although the arrangement of the weeding brushes 20 and 30 in the front and rear 2 rows is adopted in the above embodiment, the arrangement may be 1 row or 3 rows.

Description of the reference numerals

1 weeding machine

2 traveling body

3 weeding accessories

10 support body

20. 30 weeding brush

43-thread-shaped elastic body

48 front end part

49 machine body

Between 50 plants

51 lines between

52 longitudinal space.

Claims

1. A weeding brush mounted on a traveling body traveling in a paddy field to perform weeding,

the weeding brush carries out weeding through rotating, and is provided with:

a plurality of thread-like elastic bodies;

a base for fixing the elastic body in a string form,

the plurality of linear elastic bodies are arranged to extend in an elongated shape in the direction of the rotation center line of the rotation, and to form a cage-shaped structure with an open front end, enclosing a vertically long space.

2. A herbicidal brush according to claim 1, wherein the leading end portions of said plurality of elastic strand-like bodies are inclined toward said longitudinal space.

3. A brush as claimed in claim 1, wherein 1 linear elastic body is bent to form 2 linear elastic bodies.

4. A weeding attachment, comprising the weeding brush according to any one of claims 1 to 3, wherein the weeding attachment is configured to be replaceable with respect to the travel machine body.

5. A weeding machine comprising the weeding brush according to any one of claims 1 to 3, wherein the weeding brush is rotatably and drivingly attached to the traveling machine body.